Last brew I calculated by brewhouse efficiency to be 63%. Not great, but I dialled this into BeerSmith and hoped my next brew would at least be predictable, even if I was not getting the most out of the grain.
I brewed a low ABV beer for my wife. BeerSmith calculated that I would hit 1.026, I managed 1.027
The issue I have is that when I post these numbers into http://www.brewersfriend.com/brewhouse-efficiency/ along with my grain bill, it calculates my efficiency as a whopping 73%!
I don't understand how I can be so close to BeerSmiths predicted numbers, but so far above an the efficiency I have dialled into BeerSmith for my own gear!